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Title: [WIP] Enhance MTLN performance by lmdiazangulo · Pull Request #401 · OpenSEMBA/fdtd · GitHub

Open Graph Title: [WIP] Enhance MTLN performance by lmdiazangulo · Pull Request #401 · OpenSEMBA/fdtd

X Title: [WIP] Enhance MTLN performance by lmdiazangulo · Pull Request #401 · OpenSEMBA/fdtd

Description: semba-fdtd is a finite-differences in time domain solver with special focus on EMC problems. semba-fdtd can be used as a standalone solver or integrated within a FreeCAD workbench (www.elemwave.com). - [WIP] Enhance MTLN performance by lmdiazangulo · Pull Request #401 · OpenSEMBA/fdtd

Open Graph Description: Profiling seems to show that the problem is with ngspice. A possible solution would be to keep calls to it at minimum. Just when the input contains "circuits" which require it.

X Description: Profiling seems to show that the problem is with ngspice. A possible solution would be to keep calls to it at minimum. Just when the input contains "circuits" which require it.

Opengraph URL: https://github.com/OpenSEMBA/fdtd/pull/401

X: @github

direct link

Domain: github.com

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[WIP] Enhance MTLN performancehttps://github.com/OpenSEMBA/fdtd/pull/401#top
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May 4, 2026https://github.com/OpenSEMBA/fdtd/pull/401#issue-4376126728
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May 4, 2026 11:22https://github.com/OpenSEMBA/fdtd/pull/401#commits-pushed-afd2659
https://github.com/lmdiazangulo
Enhance MTLN performance by optimizing bundle processing and reducing…https://github.com/OpenSEMBA/fdtd/pull/401/commits/afd26593e46cc64a8f5b71046a91d8e71d304535
afd2659https://github.com/OpenSEMBA/fdtd/pull/401/commits/afd26593e46cc64a8f5b71046a91d8e71d304535
https://github.com/lmdiazangulo
Merge branch '398-segfault-with-mtln' into 400-mtln-cpu-performance-i…https://github.com/OpenSEMBA/fdtd/pull/401/commits/ff98c0d76f03efc1cd1f55951893e54a140f7829
ff98c0dhttps://github.com/OpenSEMBA/fdtd/pull/401/commits/ff98c0d76f03efc1cd1f55951893e54a140f7829
https://github.com/lmdiazangulo
Adds openmp to MTLN but no improvements have been observed...https://github.com/OpenSEMBA/fdtd/pull/401/commits/1080f1b626a34bbbfb0d7b73f7862034d07e04ac
1080f1bhttps://github.com/OpenSEMBA/fdtd/pull/401/commits/1080f1b626a34bbbfb0d7b73f7862034d07e04ac
https://github.com/lmdiazangulo
Merge remote-tracking branch 'origin/dev' into 400-mtln-cpu-performan…https://github.com/OpenSEMBA/fdtd/pull/401/commits/0050594b538e0d45b0832318dca5335ce09aa40d
0050594https://github.com/OpenSEMBA/fdtd/pull/401/commits/0050594b538e0d45b0832318dca5335ce09aa40d
https://github.com/lmdiazangulo
lmdiazangulohttps://github.com/lmdiazangulo
May 12, 2026https://github.com/OpenSEMBA/fdtd/pull/401#event-25435107305
https://github.com/lmdiazangulo
Add hybrid termination handler for MTLN performance optimizationhttps://github.com/OpenSEMBA/fdtd/pull/401/commits/f120bb8e17f5eb9c0decf603d5b17bd922269f85
f120bb8https://github.com/OpenSEMBA/fdtd/pull/401/commits/f120bb8e17f5eb9c0decf603d5b17bd922269f85
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Jun 10, 2026https://github.com/OpenSEMBA/fdtd/pull/401#event-26565465235
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Jun 10, 2026https://github.com/OpenSEMBA/fdtd/pull/401#event-26565498783
MTLN is ~2x slower than holland #400 https://github.com/OpenSEMBA/fdtd/issues/400
Alberto-ohttps://github.com/Alberto-o
June 11, 2026 14:33https://github.com/OpenSEMBA/fdtd/pull/401#commits-pushed-43312fd
https://github.com/Alberto-o
Merge remote-tracking branch 'origin/dev' into 400-mtln-cpu-performan…https://github.com/OpenSEMBA/fdtd/pull/401/commits/43312fd79835fbe462343529bc9c27d28d7920b2
43312fdhttps://github.com/OpenSEMBA/fdtd/pull/401/commits/43312fd79835fbe462343529bc9c27d28d7920b2
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Merge remote-tracking branch 'origin/dev' into 400-mtln-cpu-performan…https://github.com/OpenSEMBA/fdtd/pull/401/commits/0c270e4ab1b6f80112c33880649880d7f8165238
0c270e4https://github.com/OpenSEMBA/fdtd/pull/401/commits/0c270e4ab1b6f80112c33880649880d7f8165238
https://github.com/Alberto-o
Some changes to check performance reducing calls to ngspicehttps://github.com/OpenSEMBA/fdtd/pull/401/commits/f0bc7110d260df254e028a426eadfa9ea7dc0836
f0bc711https://github.com/OpenSEMBA/fdtd/pull/401/commits/f0bc7110d260df254e028a426eadfa9ea7dc0836
https://github.com/Alberto-o
Changes to make less loops and less calls to ngspice. towelHanger passeshttps://github.com/OpenSEMBA/fdtd/pull/401/commits/de4e5a01985985df5598b2e216e41f8a75d5b5fa
de4e5a0https://github.com/OpenSEMBA/fdtd/pull/401/commits/de4e5a01985985df5598b2e216e41f8a75d5b5fa
https://github.com/Alberto-o
WIP performance. Simplifies bundle-nw-circuit interaction. Removes lo…https://github.com/OpenSEMBA/fdtd/pull/401/commits/62454ee7de78c5ed987a532c27ccec6e1bb67628
62454eehttps://github.com/OpenSEMBA/fdtd/pull/401/commits/62454ee7de78c5ed987a532c27ccec6e1bb67628
https://github.com/Alberto-o
Adds towelHanger case preposthttps://github.com/OpenSEMBA/fdtd/pull/401/commits/f708d42c9abb165f61f78c34b4324d57a794c373
f708d42https://github.com/OpenSEMBA/fdtd/pull/401/commits/f708d42c9abb165f61f78c34b4324d57a794c373
https://github.com/Alberto-o
Changes make MTLN 2x faster. Need to check MPI and fix some testshttps://github.com/OpenSEMBA/fdtd/pull/401/commits/54f1d3ac4075253a6527669dc2d65c281598d1e1
54f1d3ahttps://github.com/OpenSEMBA/fdtd/pull/401/commits/54f1d3ac4075253a6527669dc2d65c281598d1e1
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Fixes spice unit tests. Needed due to changes in circuit modulehttps://github.com/OpenSEMBA/fdtd/pull/401/commits/b5f9ad9ffc5625d55efeb59d2fc3b8acfa2ca4e8
b5f9ad9https://github.com/OpenSEMBA/fdtd/pull/401/commits/b5f9ad9ffc5625d55efeb59d2fc3b8acfa2ca4e8
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June 18, 2026 13:33https://github.com/OpenSEMBA/fdtd/pull/401#event-26913457829
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June 18, 2026 13:39https://github.com/OpenSEMBA/fdtd/pull/401#commits-pushed-77582e9
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Replace GFortran-specific SYMLNK with portable create_symlink helperhttps://github.com/OpenSEMBA/fdtd/pull/401/commits/77582e9e3661966c6045c36de0bec6606e192a3d
77582e9https://github.com/OpenSEMBA/fdtd/pull/401/commits/77582e9e3661966c6045c36de0bec6606e192a3d
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Use ISO C binding for create_symlink: no shell, proper error reportinghttps://github.com/OpenSEMBA/fdtd/pull/401/commits/b5862e7222743c1a5773c452a7667c14389d836a
b5862e7https://github.com/OpenSEMBA/fdtd/pull/401/commits/b5862e7222743c1a5773c452a7667c14389d836a
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Fix in solver/nws for open nodes. Some other minor fixes. WIP test re…https://github.com/OpenSEMBA/fdtd/pull/401/commits/98a3106caaed65fb788f5fbd4de3df8f8a359c46
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Missing updated testshttps://github.com/OpenSEMBA/fdtd/pull/401/commits/e8115c3f29cd136ede6c7d8cb88ba979047383e2
e8115c3https://github.com/OpenSEMBA/fdtd/pull/401/commits/e8115c3f29cd136ede6c7d8cb88ba979047383e2
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MTLN is ~2x slower than holland https://github.com/OpenSEMBA/fdtd/issues/400
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